Typewriter attachment



Feb. 25, 1936.

M. W. KRAUTH TYPEWRITER ATTACHMENT Filed March 31, 1934 2 Sheets-Sheet J.

INVEN FOR ATTORNEYS Feb. 25, 1936. M. w. KRAUTH 2,031,962

TYPEWRITER ATTACHMENT Filed March 31, 1934 2 Sheets-Sheet 2 WHJHI MJ ATTORNEYS Patented Feb. 25, 1936 UNITED STATES TYPEWRITER ATTACHMENT Marie W. Krauth, Hamilton, Ohio, assignor to Krauth & Benninghofen, Hamilton, Ohio Application March 31, 1934, Serial No. 718,417

, 1 Claim.

-This invention relates to a carbon sheet holding fixture for attachment upon the carriage of entries in making records requiring manifold,

copies, and for greater expediency, to utilize continuous form printedwebs or strips of stationery 10 in a commercial or standard typewriter.

It is therefore an ob ect of the invention to provide a fixture for convenient attachment upon the carriage of a typewriter to guidingly support several continuous lengths or webs of 15 stationery at an elevation above the carriage and lead the same downwardly to and about the cylindrical impression platen mounted within the carriage and thereby present an extended portion of the webs between which carbon sheets can be 20 interposed or interleaved and movable suspendingly sustained for either advancing with the webs, as the platen is rotated, the webs and carbon sheets being normally held under a clamping tension or pressure against the periphery of the platen, or for retracting the carbon sheets at will, preferably automatically upon release of the platen gripping or clamping tension to reposition the carbon sheets longitudinally of the webs.

Another object of the invention is to provide a typewriter carriage with a fixture, when using continuous or web lengths of stationery and in the plural number of webs for making manifold copies, for translatably supporting sheet lengths of carbon or-manifolding paper, relatively interposed or interleaved between the several webs of a series, for quickly repositioning the carbon sheets at will and after determined portions of the webs have been typed upon and issued from the impression platen of the typewriter, by mov- 40 ing the carbon sheets in a retracting or retreating direction longitudinally of the webs. 7

Another object of the invention is to provide for readily and conveniently replacing or renewing the carbon sheets.

5 Various other features and advantages Will be more fully set' forth in the description of the accompanying drawings forming a part of the specification, in which:-

Figure 1 is a perspective view of the carbon 50 sheet holder applied to a typewriting machine.

- Figure 2 is an enlarged side elevation of the same.

Figure 3 is a section on line 33, Figure 2. Figure 4 is a central vertical section through 55 the same.

Figure 5 is a diagrammatic top plan view of a typewriter carriage equipped with a pin carrying gauge and tear-off bar for relatively aligning and registering the continuous webs or work strips engaged about the cylindrical writing platen of 5 v the typewriter.

Figure 6 is a perspective viewof a carbon or manifolding sheet hemmed over at one end to sleeve the same for mounting upon a hanger bar, the bar adapted to be removably connected upon 10 a movable rack of the holder.

Referring to the drawings, I indicates a commercial typewrilmr, with a cross-wise traveling carriage 2, carrying a rotative cylindrical platen 3 about which the webs or work strips 4 are engaged in the usual manner for typing thereon.

Carbon or manlfolding sheets 5 are interleaved between the several strips in the customary manner for making manifold copies of the typing impression.

The carbon or manifolding-sheets are individually mounted upon a holder comprising a sheet metal angle bracket 6, mounted upon the car-, riage 2 across the rear side thereof. The base limb of the bracket from its forward edge and at 5 opposite ends thereof is provided with forwardly extended arms 'l-1, each having its free end formed into a claw to claspingly engage and seat upon a cross rod 8 of the typewriter carriage 2.

The vertically extended limb of the bracket 6 at 0 its opposite ends is formed with forwardly extended lugs 9, to which tie. or brace rods Ill-l0 are respectively fixed, the rods each extending forwardly and fixed to the carriage, at appropriate established points to'which connection can be made, for rigidly securing the bracket to the carriage. The bracket, therefore, is mounted as a fixture upon the carriage without in any wise disturbing the key shift of the cylindrical platen.

The bracket, centrally thereof, removably sup- 40 ports a vertical tubular post H, and the upper end of the post journals a grooved guide roller l2 for sustaining a chain or cord l3 having a counterweight l4 fixed to one end thereof, housedand traveling in the post I I. The opposite end of the chain 13 connects with a rack plate [5 slidably mounted upon the post II. The rack plate l5 at its opposite ends and forward side is provided with a pair of hooks IB-IG, for sustaining one or a plurality of rack bars ll, each at its oppo- '50 site ends apertured for engagement with the hooks l6 and projected through the sleeved end of a carbon sheet 5, for dependingly supporting the sheet from the rack for interleaving between the continuous work strips, and therewith enfixed to the top end of the post II.

supply, either fiat packaged by zigzag folding or reel wound, upwardly upon and over the stationary guide bar I8, relatively in superposed arrangement thence directed downwardly to be interleaved by the carbon sheets 5 and thence with the-carbon sheets engaged about the cylindrical rotary writing platen 3 in the usual manner for typing thereon.

The continuous webs or work strips 4 on the face side contain the customary printed forms, at

definite spacing. The space between the adjacent forms is provided with a pair of. crosswise aligned perforations or filing holes for the head end of a printed form, which are utilized for bringing the corresponding forms or longitudinal writing spaces of the several strips into registration and alignment. For this purpose the carriage of the typewriter at its forward side and slightly above the cylindrical platen is provided with a gauge bar I 9 (see Figs. 4 and 5) fixed at its opposite ends to the frame of the carriage, and extending thereacross. The gauge bar I9 extends in a vertical plane in a line tangent with the forward side of the cylindrical writing plate with its rear side provided with a pair of laterally extended pins 20-20 spaced for engagement through a set of perforations in the work strips 4, for adjusting or bringing the forms into registration or alignment. The gauge bar I9 is also utilized as a tear blade for severing or tearing off the typed forms of a series from the continuous strips, and for anchoring the strips for a tearoff operation or for holding the same to reset the carbon sheets.

For a tear-off operation, the strips are advanced by the rotative feeding action of the writingplaten for the full length of. a form, or amount sufiicient to permit a successive set of perforations to be brought into engagement over the pins 28 of the gauge bar I9, which generally requires adjusting the several strips of a series to bring the corresponding sets of apertures thereof into registration to engage the pins. This necessarily conditions as to registration and alignment the corresponding forms next in order to be typed,

and anchors the withdrawn or extracted portion of the stripsto the gauge bar I9, drawn forwardly over the upper edge of said bar. With the strips thus held by bearing the same downwardly, starting at one longitudinal edge of the strip, the issued portion can be torn across the tearing edge of the bar I9 and severed from the continuous strip.

The strips are held against the periphery of the impression platen 3 under a gripping tension induced by tension rollers or the like releasably controlled and a part of the carriage mechanism. Thereupon upon freeing the strip of such platen gripping tension, the carbon sheets, under the retracting pull of the counterweight l4 are drawn backwardly and from beneath or between the extracted end portions of the strip a sufficient distance to clear the next successive set of perforations in the strips, for engagement with the pins 20 of the gauge bar I9.

Adjustment of the strips for registration and alignment generally must be made periodically at least for each length of form. if they are not excessively long, as a relatively difi'erent degree of advance is imparted by onestrip to the other,

' sion against the impression platen. Therefore they are not apt to be wrinkled in the feeding ad-, vance of the platen, so that a smooth sheet surface is always presented insuring clear manifold impressions. Instantly upon releasing the sheets of the platen gripping or clamping pressure, they will be automatically retracted. The retreat, however, can be controlled by eitherlocking the rack bar to the posts or withholding the descent of the counterweight. Preferably, however, the cord or chain length is adjusted through its connection with the rack bar, so that when the weight has descended to the bottom of the post,'and is then at rest, the carbon sheets will have been retracted sufliciently to be in proper position for the next succeeding forms of the several strips for starting the typing thereon.

The carbon sheets 5, each at one end are sleeved for connecting the same to an individual rack bar I1, as shown in Fig. 6, formed by overlapping one end of the sheet and adhesively securing an edge margin of the lap to the underlying body portion of the sheets.

The strips are longitudinally guided in their travel by a pair of guide pins 2I-2I extending laterally from the forward side of the vertical limb of the bracket 6 and also by guide lugs 22-22 extended upwardly at opposite ends of the guide bar I8.

A finger or thong 23 extends downwardly centrally from the guide bar I 8 and is fixed upon a rack bar 24 mounted within upstanding lugs 2525 at the opposite ends of the guide bar I8, serving to apply a slight tension to the uppermost strip of the series, as shown inFig. 2.

The use of sheet lengths of carbon paper, effects economy. The sheet lengths can be more conveniently handled for insertion between the webs and more suitably compactly packed in a flat condition for storage and shipment and to avoid injury to the inked surface or side of the sheet. By tautly holding the sheets between the webs they are less apt to be wrinkled as advanced by the impression platen, and being uniformly suspended from the rack they require no individual adjustment to align their free edges.

Several methods may be practiced in loading as the webs can be either individually draped over the guide bar I8 of the fixtures and drawn down to the impression platen following thereafter by hanging a carbon sheet upon the rack, while it is in its uppermost position, which will appropriately place the carbon sheet over the face side of the 7 upon the carriage, and beinglocated upon the rear 75 side of the carriage is'out of the way of any interference to the ordinary use of the typewriter.

The entire fixture is comparatively light in weight and therefore does not overload the carriage and require the carriage traversing tension to be increased, and is of simple design and op eration.

Having described my invention, I claim:

In a device of the nature disclosed, a frame including a tubular post, a rack slidably mounted upon the post, a counter-weight for said rack slidably housed within said post and connecting with said rack, and sheet holding bars removably attached upon one side of said rack, each bar for engagement through a sleeved end of a sheet for suspendingly sustaining the sheet.

MARIE WM. KRAUTH'. 

